An Allegheny County jail inmate Wednesday notified a guard about a fire in his cell, prompting the evacuation of a pod housing 80 inmates on the jail's sixth floor, Warden Orlando Harper said Thursday.

Two officers using a fire extinguisher put out the fire before Pittsburgh firefighters arrived, Harper said in a news release. The fire, which started about 3:25 p.m., was not large enough to activate the jail's sprinkler system.

A sergeant and a corrections officer were treated at an area hospital for smoke inhalation and released. They have returned to work. No inmates were injured.

Harper said Pittsburgh fire investigators would determine the exact cause and origin of the fire, but he suspects the source was contraband that one of two inmates had in the cell. He did not identify the contraband.